Why do i keep throwing my chain when i let off the gas the chain is tight

CHAIN STRETCHS AS IT HEATS - KEEP CHAIN TIGHTENED CORRECTLY AND ALWAYS KEEP OIL IN OILER AND MAKE SURE IT OILS THE CHAIN. IF THIS DOESN'T FIX - REPLACE THE CHAIN. IF IT STILL HAPPENS THEN REPLACE BAR. WILL FAIL AGAIN WITHOUT OIL. POULAN WILL NOT HOLD UP WITHOUT CHAIN LUBRICATION. WORSE THAN OTHERS. IF CHAIN OR BAR OVERHEATED YOU'LL WORK ON IT MORE THAN YOU CUT. OIL IS THE KEY TO CUT WITH A POULAN!

If the chain starts to get loose then you need to tighten it up or it will throw itself off the bar, also if you do not keep the chain tight and sharp the chain will be damaged when it is thrown off the bar.

If the chain is showing signs of heavy wear, suggest replacing both the bar and the chain. Check the sprocket on the clutch hub for heavy wear on the teeth which will hasten wear on the chain teeth. Check chain oiling by running the saw tip near some cardboard at speed for a moment or two--it should throw off a thin line of oil. Tighten the chain until the lower run of chain just comes up to the bar, but not so tight that you can't turn the chain by hand. Hope this helps!

Make sure the chain has not been damaged from past slipping by removing it from the machine and laying the chain out in a large circle on a flat surface. No part of the chain should be standing free of the surface--replace the chain if it does. The chain should be adjusted so that the chain just comes up to the lower bar edge, but not so tight that the chain cannot be turned by hand. Make sure the teeth are quite sharp for maximum cutting effect and minimum heat. Check the chain lubrication by running the bar tip at speed for a moment or two near some cardboard--it should throw off a thin line of oil. Don't continue to run the saw if the chain starts to droop from the bar. If it is quite hot, allow it to cool which should re-tighten the chain. Hope this helps!

Open the chain guard.Once there look for a bolt that hold the chain plate.The chain plate has a large groove and the bolt.djust the chain by plull to the front until the chain is tight,but not too much,just test by hand if is move freely but tight.Reverse the procedure.


If you need more help come back.Post / thumbs / testimonial are welcome!

Remove the bar and chain. Lay the chain out on a bench or table and examine for sideways bent/broken links, badly damaged cutting teeth, or damaged drive teeth. Inspect the bar chain-groove all the way around for any damage. Make sure the tip sprocket turns freely and is not damaged. Check the sprocket on the clutch drum for hooked teeth or other damage. Clean the small oil passages that feed oil out to the chain groove in the drive end of the bar. Start the engine and check the engine side port where the bar fits to--it should ooze out oil from the small port there. If everything checks ok, re-assemble the bar and chain leaving the cover fasteners finger tight. Adjust the chain until it pulls up to the bar, but not so tight that you can't turn turn it by hand. Tighten the bar fasteners and re-check the chain tension. Start the engine and hold the bar tip near some cardboard--it should throw off a thin line of oil after several moments of running at speed. Hope this helps!

Is the chain being properly oiled? Make sure the cover fasteners are tight after adjustment. If the chain is dull or is improperly sharpened, it will heat badly causing the chain to become loose. Adjust the chain (cover fasteners finger tight) so that the chain just comes up to the lower bar, but not so tight that you can't pull the chain by hand. Make sure the teeth cut toward you on the bottom run. Run the engine at speed with the bar tip near some cardboard for a few moments, it should throw off a thin line of oil onto the board. Hope some of this helps!

Remove the chain drive side plate and remove the bar. Clean the drive area and inspect the drive sprocket for excessive wear. Run the motor for a short time to make sure that oil is being pumped out to the bar--is should just ooze out. Clean the bar chain groove and clean the oil holes at the drive end of the bar--especially the two small holes that go from the large oil holes out to the chain groove. Back off the chain adjustment screw several turns, then fit the chain over the sprocket (teeth cut toward you on the bottom) and then insert the bar into the chain and push the bar out till the chain is fairly tight. Apply the side cover and make sure the adjustment tang drops into the large hole at the rear of the bar. Install the mounting nut(s) to hold the plate and bar together. When run-up finger tight, turn the adjustment screw CW until the chain becomes tight enough that it doesn't droop from the bar, yet can be be turned by hand. Tighten the side cover nut(s) and recheck tension. If ok, run the saw for a few moments with the bar tip near some cardboard--it should throw off a thin line of oil. Keep the chain properly sharpened to reduce the chance of this occurring again. Hope this helps!

Your chain should not be tight ... only snug. If it keeps throwing the chain, your bar is not on correctly and/or the clutch needs replaced. Do not use old chain with a new clutch.

i have a 4620 poulan that had the same problem. use it for 10 minutes, spend 15 minutes reinstalling the chain. i sent poulan an email threatening to sue them and they decided to send me the parts to change it over to the old style for free. try poulan.com